Build(deps): Bump message_bus from 4.3.9 to 4.4.0 (#31845)

Bumps [message_bus](https://github.com/discourse/message_bus) from 4.3.9
to 4.4.0.
-
[Changelog](https://github.com/discourse/message_bus/blob/main/CHANGELOG)
-
[Commits](https://github.com/discourse/message_bus/compare/v4.3.9...v4.4.0)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -254,7 +254,7 @@ GEM
     matrix (0.4.2)
     maxminddb (0.1.22)
     memory_profiler (1.1.0)
-    message_bus (4.3.9)
+    message_bus (4.4.0)
       rack (>= 1.1.3)
     messageformat-wrapper (1.1.0)
       mini_racer (>= 0.6.3)
@@ -924,7 +924,7 @@ CHECKSUMS
   matrix (0.4.2) sha256=71083ccbd67a14a43bfa78d3e4dc0f4b503b9cc18e5b4b1d686dc0f9ef7c4cc0
   maxminddb (0.1.22) sha256=50933be438fbed9dceabef4163eab41884bd8830d171fdb8f739bee769c4907e
   memory_profiler (1.1.0) sha256=79a17df7980a140c83c469785905409d3027ca614c42c086089d128b805aa8f8
-  message_bus (4.3.9) sha256=4e79623fd36349799d46bc05450a2aa1ba9df8f8553e055c3cf26751ebf4cc51
+  message_bus (4.4.0) sha256=fd46aa5616b0c346463a410c9898dc8704bea4e86f29660ac5a4d08781b6fb24
   messageformat-wrapper (1.1.0) sha256=ecea879626e412d1bc841c457dacfcbb1a62cf88ca83573e4ea34bb371f160bc
   method_source (1.1.0) sha256=181301c9c45b731b4769bc81e8860e72f9161ad7d66dd99103c9ab84f560f5c5
   mini_mime (1.1.5) sha256=8681b7e2e4215f2a159f9400b5816d85e9d8c6c6b491e96a12797e798f8bccef